BAT41-TAP - 100V 100mA Small Signal Schottky Diode | Vishay
MPN: BAT41-TAP ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $0.09 | $0.09 |
| 10 | $0.075 | $0.75 |
| 100 | $0.05 | $5.00 |
| 500 | $0.038 | $19.00 |
| 1,000 | $0.028 | $28.00 |
BAT41-TAP Overview
A small signal Schottky diode is a two-terminal semiconductor rectifier that uses a metal-to-silicon barrier junction instead of a PN junction. Within the component hierarchy it sits under diode, rectifier, discrete semiconductor. Because majority carriers conduct across the barrier, Schottky diodes exhibit very low turn-on voltage and essentially zero reverse recovery time, which makes them the preferred choice where switching speed and low IR losses dominate over reverse leakage.
Key features of the BAT41-TAP include its low turn-on voltage, high breakdown voltage (100 V, unusually high for a small-signal Schottky), and extremely fast switching with low forward and reverse recovery times. The die is protected by a PN junction guard ring against excessive voltage events such as electrostatic discharge (ESD), improving ruggedness in production handling and field environments.
Technically, the device is a general purpose metal-to-silicon Schottky designed for switching-mode operation with low IR losses. The guard-ring termination stabilizes the leakage behavior across temperature and supports repetitive fast switching cycles without degradation. The DO-35 glass body provides hermetic sealing, contributing to long-term reliability compared with molded plastic axial packages.
Typical applications include audio signal clipping and asymmetric distortion circuits in guitar pedals, polarity protection and OR-ing of low-current rails, high-frequency signal detection and clamping, and general purpose fast-switching duties in consumer and industrial equipment. AEC-Q101 qualification is available in the family (part number on request), extending suitability toward automotive designs.
Design consideration: the Schottky trade-off is higher reverse leakage than silicon PN diodes, and leakage roughly doubles every 10C, so verify reverse power at maximum ambient temperature. Also note the 100 mA current ceiling - do not use it where rectifier-class parts are required.
This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet, adding selection and cross-reference value for engineers and buyers.
Drop-in alternatives for BAT41-TAP — same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
Variants in this series
Same-series models that are drop-in compatible with BAT41-TAP (same form factor and footprint) — differing in Package, ESD Protection, Technology, Mounting Type, Repetitive Peak Reverse Voltage (VRRM).
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
BAT41
✅ Drop-In✓ In Stock
$0.028 / Unit
View Datasheet →BAT42-TAP
✅ Drop-In ⚠️ 参数待验证✓ In Stock
$0.035 / Unit
View Datasheet →BAT43
✅ Drop-In ⚠️ 参数待验证✓ In Stock
$0.08 / Unit
View Datasheet →BAT46WH
✅ Drop-In ⚠️ 参数待验证✓ In Stock
$0.029 / Unit
View Datasheet →BAT85
✅ Drop-In ⚠️ 参数待验证📋 Reference alternative (not in catalog)
BAT41-TAP Maximum Ratings & Electrical Characteristics
| Diode Type | Small Signal Schottky Barrier |
| Reverse Voltage (VR) | 100 V |
| Average Forward Current | 100 mA |
| Non-Repetitive Peak Forward Current (IFSM) | 750 mA |
| Package | DO-204AH (DO-35) axial through-hole |
| Mounting Type | Through Hole |
| Turn-On Voltage | Low (Schottky barrier) |
| Switching Speed | Extremely fast, low forward and reverse recovery times |
| ESD Protection | PN junction guard ring |
| Intended Use | General purpose, switching mode with low IR losses |
| Automotive Qualification | AEC-Q101 qualified version available (part number on request) |
| Configuration | Single diode |
| RoHS Status | Compliant |
BAT41-TAP Pin Configuration
| Pin 1 | Anode — Anode terminal - current enters here in forward conduction (unbanded end of DO-35 body) |
| Pin 2 | Cathode — Cathode terminal - marked by the polarity band on the DO-35 glass body |
Typical Applications
BAT41-TAP is suitable for 6 applications: Audio Clipping and Guitar Pedal Distortion, Low-Current Rectification and Rail OR-ing, High-Frequency Signal Detection and Clamping, ESD-Robust General Purpose Switching, Automotive Signal and Protection Circuits (Q101 Variant), Test, Measurement and Prototype Fixtures.
Audio Clipping and Guitar Pedal Distortion
The BAT41-TAP is widely used in audio clipping stages, including overdrive and distortion pedals, because its low Schottky turn-on voltage produces earlier and softer clipping than silicon PN diodes such as the 1N4148. In asymmetrical clipping networks, one BAT41-TAP per half-cycle shapes the transfer curve; the 100 V rating provides generous headroom, while the low junction capacitance of the DO-35 small-signal construction minimizes treble loss in the signal path. Community designs (reverb pedals, Zendrive-style layouts) routinely reference the BAT41. Place the diodes in the feedback path of an op-amp gain stage; the soft Schottky knee yields a musically pleasing compression character. Avoid substituting high-VF rectifiers, which shift the clipping threshold and change distortion harmonics.
Recommended
Low-Current Rectification and Rail OR-ing
With a 100 mA average forward current rating and low forward voltage, the BAT41-TAP fits low-current rectification, polarity protection, and simple diode-OR of auxiliary supply rails in consumer and industrial equipment. Its low IR losses suit switching-mode duties where efficiency at the milliamp scale matters, and the 100 V reverse rating covers 48 V-class rails with margin. In an OR-ing configuration, place one BAT41-TAP per source so the higher rail conducts while the Schottky's low VF minimizes voltage drop compared with a PN diode, preserving regulator headroom. The trade-off is reverse leakage at elevated temperature - verify that leakage power at maximum ambient stays negligible relative to load current.
Recommended
High-Frequency Signal Detection and Clamping
The BAT41-TAP's extremely fast switching, with low forward and reverse recovery times inherent to Schottky majority-carrier conduction, makes it appropriate for RF signal detection, envelope detection, and fast clamping of signal lines. Unlike PN junction diodes, there is no reverse recovery charge to smear transitions, so the device responds well into the megahertz range, limited chiefly by junction capacitance. In detector circuits, the diode rectifies the RF envelope into a smoothing capacitor; the low turn-on voltage improves sensitivity for small-signal detection. Designers should confirm the exact capacitance value from the Vishay datasheet when operating at the upper frequency range, and keep lead lengths short in through-hole layouts to limit parasitic inductance.
Recommended
ESD-Robust General Purpose Switching
The BAT41-TAP die is protected by a PN junction guard ring against excessive voltage events such as electrostatic discharge, which suits production environments with manual handling and general purpose switching duties in equipment subject to transient stress. The guard-ring termination stabilizes reverse characteristics across temperature and repeated fast switching cycles. Typical uses include flyback clamping on small relays and inductive loads (within the 100 mA / 750 mA peak limits), logic-level signal steering, and freewheeling duties in low-current switched circuits. When clamping inductive kickback, confirm that stored energy and clamp current remain below the 750 mA non-repetitive peak rating and that repetition rate keeps average dissipation within datasheet limits.
Recommended
Automotive Signal and Protection Circuits (Q101 Variant)
AEC-Q101 qualification is available in the BAT41 family (part number on request), enabling use of the 100 V Schottky technology in automotive signal-path, sensor bias, and reverse-polarity protection circuits operating at small currents. The 100 V rating provides margin against load-dump-adjacent transients when combined with upstream suppression, and the guard-ring ESD protection adds robustness at harness connectors. For automotive deployments, order the qualified part number rather than the standard -TAP suffix and verify the manufacturer's AEC-Q101 certificate and PPAP availability. The through-hole DO-35 package also suits serviceable automotive test fixtures and prototype harness boards where solder-in diodes are preferred.
Recommended
Test, Measurement and Prototype Fixtures
The hermetic DO-35 glass package and through-hole leads make the BAT41-TAP convenient for breadboards, wire-wrap prototypes, and measurement fixtures where signal diodes are frequently inserted and removed. Its well-characterized low forward voltage serves as a known reference junction in probe circuits, detector front-ends, and curve-tracer demonstrations. The 100 mA ceiling matches typical fixture signal levels, and the 100 V rating safely absorbs accidental connection to higher-voltage bench rails that would destroy lower-rated Schottky diodes. For permanent fixture builds, note that axial leads should be bent at least 2 mm from the glass body to avoid sealing stress cracks during forming.
Recommended
Recommended Products Summary
Engineering reference data for BAT41-TAP — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | BAT41 | BAT42-TAP | BAT46 | BAT85 |
|---|---|---|---|---|---|
| Package | DO-204AH (DO-35) axial | DO-204AH (DO-35) axial - same | DO-204AH (DO-35) axial - same | DO-204AH (DO-35) axial - same | DO-204AH (DO-35) axial - same |
| Brand | Vishay Intertechnology | Vishay Intertechnology | Vishay Intertechnology | Vishay Intertechnology | Vishay Intertechnology |
| Reverse Voltage (VR) | 100 V | 100 V | 30 V | 40 V | 40 V |
| Forward Current | 100 mA | 100 mA | 100 mA | 350 mA | 200 mA |
| Diode Technology | Schottky, guard-ring ESD protected | Schottky, guard-ring | Schottky | Schottky | Schottky |
| Switching Speed | Extremely fast, low recovery times | Extremely fast | Fast Schottky | Fast Schottky | Fast Schottky |
| Mounting | Through Hole | Through Hole | Through Hole | Through Hole | Through Hole |
Key Differentiators
- Highest reverse voltage in the DO-35 small-signal Schottky family (vs BAT42-TAP)
- Guard-ring ESD protection (vs BAT41 (standard die variants))
- Lower forward current than BAT46 in exchange for 2.5x voltage rating (vs BAT46)
Design Notes
At the rated 100 mA average forward current, a small-signal Schottky in DO-35 dissipates only tens of milliwatts, so no heatsinking is required. The dominant thermal effect is reverse leakage, which approximately doubles every 10C junction temperature rise; in high-impedance or battery-powered circuits, check that leakage at maximum ambient does not erode signal integrity. Estimated: a 0.4 V forward drop at 100 mA gives roughly 40 mW dissipation - negligible for the DO-35 glass package in still air.
Respect the 100 mA average current ceiling - the BAT41-TAP is a signal diode, not a power rectifier, even though the 750 mA IFSM peak rating may suggest otherwise. Peak rating is non-repetitive and short-duration only. Also avoid substituting a 1N4148 in clipping or detection circuits: its higher forward voltage changes the clipping threshold by hundreds of millivolts and audibly alters distortion character in audio designs.
For through-hole assembly, bend axial leads at least 2 mm from the glass body to prevent mechanical stress cracks in the hermetic seal, per standard DO-35 forming practice. Keep lead dress short in RF detector roles, since axial lead inductance limits high-frequency performance. Observe polarity: the cathode band must align with the circuit's cathode node; reversed installation applies reverse voltage and blocks forward conduction.
Compliance Information
RoHS compliance per distributor listings. AEC-Q101 qualified family version available per Vishay datasheet (part number on request) - standard BAT41-TAP is the consumer/industrial suffix. AEC-Q100 marked not_applicable as this is a discrete diode (AEC-Q101 applies).
